CKE Restaurants, holding company for Carl's Jr. and Hardee's, is putting the chains' U.S. creative and digital work up for review.
The incumbent agency, 72andSunny, is among the select group of agencies invited to respond to the RFP, the company said.
The review comes months after Jeff Jenkins joined the company as its chief marketing officer.
CKE said it is proud of its relationship with 72andSunny and the evolution of the creative work. The agency has worked with the fast-food chain for six years.